After an Over-the-Air (OTA) software update on some 2021-2022 Corvette and 2022 Envision models, the radio may not turn off after the vehicle’s ignition has been turned off and the driver’s door has been opened, leaving Retained Accessory Power still active. If the vehicle is left in this state for an extended amount of time, the battery may become discharged.
These conditions may be caused by a failed OTA update for the Serial Data Gateway Module (SDGM)
To address this concern, check to see if the vehicle has recently received an OTA update. On the infotainment screen, select Settings > System > Updates. (Fig. 6) If the OTA update failed, it may not show under the updates history on the infotainment screen.
Fig. 6
Also check the condition of the battery following the procedures in the appropriate Service Information. After recovering the battery following the Battery Inspection/Test procedure, perform the Battery Electrical Drain/Parasitic Load Test procedure to confirm there is not a parasitic drain present on the vehicle.
Once the condition of the battery and electrical system components have been confirmed, check the SDGM for the latest software using SPS2. Program the SDGM if an update is needed.
Refer to #PIC6480A for more information.
– Thanks to Mike Waszczenko
